Rafael Nadal had to battle back from a set down to beat Frenchman Paul-Henri Mathieu 3-6, 6-3, 6-2 in Montreal.
Rafael Nadal will have to contend with more than 15,000 fans determined to ruin his 20th birthday celebrations when he faces the French hope on Saturday.
World No 1 Novak Djokovic will kick off the defence of his Australian Open title with a first round tie against unseeded Frenchman Paul-Henri Mathieu after the draw was made for the first Grand Slam of the season on Friday.
The second round of this year's Wimbledon has equalled the record for withdrawals and retirements for a single round at a Grand Slam in the professional era after two more players quit on Thursday.
Images from the matches played at the Australian Open on Monday.
World No 1 Rafael Nadal faces highly-rated 20-year-old Dominic Thiem in the second round on Thursday as he continues his quest for a record-extending ninth French Open title.
Rafael Nadal, looking to extend his French Open record to nine titles, starts his Roland Garros campaign with what is likely to be his only appearance on court Suzanne Lenglen on Monday.
Frenchman Paul-Henri Mathieu gave the defending champion a nasty 20th birthday fright before the Spaniard prevailed 5-7, 6-4, 6-4, 6-4.
Russian Nikolay Davydenko clinched his first title of the season on Sunday when he crushed Frenchman Paul-Henri Mathieu 6-4, 6-2 to win the German Open.
James Blake fought off two match-points to beat Paul-Henri Mathieu 7-6, 6-7, 6-3, 3-6, 7-5 and lifted the United States to a 2-0 lead over France in their Davis Cup quarter-final on Friday. Earlier in the day, Andy Roddick gave the US a 1-0 lead in a close 6-4, 7-6, 7-6 victory over Michael Llodra.
Novak Djokovic takes his first steps towards entering the history books on Monday and the two-time defending Australian Open champion is taking nothing for granted in his first round clash.
Novak Djokovic showed brief flashes of his best tennis as he began his bid for a third successive Australian Open title with a workmanlike 6-2, 6-4, 7-5 win over Paul-Henri Mathieu on Monday.
Roger Federer and Juan Martin del Potro will meet on Sunday for the first time since their epic Olympic Games clash after both beat French opponents to reach the final of the Basel Open.
Maria Sharapova made up for lost time as she hurried into the third round of the French Open, while former champion Ana Ivanovic went down to Italian Sara Errani.
Roger Federer and Mareia Sharapova provided proved too strong in gale-force winds to breeze into the fourth round of the US Open on Saturday.
Eighth seed American Andy Roddick has pulled out of the Toronto Masters because of illness, the ATP Tour said on Tuesday.
Australian Open runner-up Jo-Wilfried Tsonga pulled out of France's team for their Davis Cup quarter-final against the United States with a knee injury. World number 13 Tsonga, who felt pain in his right knee during training and will have to rest for a week, will be replaced by Arnaud Clement.
Wilcard entrant Nicolas Kiefer beat third seed Paul-Henri Mathieu 6-4, 6-3, while German Rainer Schuettler knocked out seventh seed Julien Benneteau 7-5, 6-3 at the ATP Mumbai Open tennis tournament.
Roger Federer will carry the hopes of the older generation when he faces Paul-Henri Mathieu in the third round of the French Open in Paris on Saturday. With 27-year-old Federer the only player among the world's top four to be aged over 22, Australian Lleyton Hewitt said he expected the Swiss to do the golden oldies proud at this year's claycourt Grand Slam.
The world number one beat Frenchman Sebastien Grosjean 6-3, 6-3 in the second round of the Toronto Masters.
Mardy Fish handed the French 32nd seed a 7-5, 6-2, 6-2 drubbing in the fourth round of the US Open.
Second seed Fernando Gonzalez won the Munich Open with a scrappy 7-6, 6-7, 6-3 victory over Italy's Simone Bolelli on Sunday.
Former French Open champions Gustavo Kuerten and Carlos Moya slumped to first-round defeats at the Monte Carlo Masters.
Andy Roddick took out his frustrations on Frenchman Paul-Henri Mathieu on Sunday to seal a place for the United States in the Davis Cup semi-finals, where they will take on Spain. Russia and Argentina will contest the other semi-final in September after wrapping up their ties with a match to spare.
The eighth seeds beat Swiss Yves Allegro and Paul-Henri Mathieu of France 2-6, 6-0, 10-3 in the first round in Miami.
Mario Ancic, on a comeback trail after dropping out of top 100, knocked out sixth seed Marcos Baghdatis 6-4, 6-2.
British number one Andy Murray stormed into the Marseille Open final with a 6-2 6-2 win over Frenchman Paul-Henri Mathieu on Saturday.
Russia's Elena Dementieva gave herself an early birthday present when she rallied after dropping the first set to beat Serena Williams 5-7 6-1 6-1 and win her maiden Kremlin Cup title on Sunday.
Marat Safin beat Jarkko Nieminen of Finland 5-7, 6-3, 6-2 in the first round of the Monte Carlo Masters.
Marat Safin won the deciding rubber to give Russia a 3-2 win over France in the World Group tie.
The fifth seed became the first major casualty at the Cincinnati Masters, losing in the opening round.
Roger Federer and Rafael Nadal returned from vacation to post first-round wins at the Toronto Masters.
Roger Federer began the defence of his Dubai Open title with a 7-6, 6-3 win over compatriot Stanislas Wawrinka
Rafael Nadal will bid for a third consecutive title on Sunday when he faces 35-year-old Andre Agassi
The top seed beat Mariano Puerta in 72 minutes to set up a semi-final with France's Paul-Henri Mathieu in the Montreal Masters.